orthologous human mouse genes have conserved exonic structure.
		•  85% of the orhologous pairs have identical number of exons • 91% of the orthologous exons have identical length • 99.5% of the orthologous exons have identical phase •  there are a few cases of intron insertion/deletion (22) •  U12 introns appear to be strongly conserved between human and mouse •  non-canonical GC-AG are less conserved.